Safety lock for brake-rod pins



G. T. COOKE SAFETY LOOK FOR BRAKE ROD PINS May 10, 1927. v 1,628,119

Filed March 12, 1926 5 4 v,rllii'n m um z ANVENTOR ao'ggedoofw Y aATTORN EYS Patented May 10, 1927.

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Application fled men 1:, 1926. Serial No. 04.110.

This invention relates to safety locks for pivot bolts, ins, and thelike, the invention being particular utility when employed in connectionwith a not pin for holding a brake rod to a brafie lever' with which itis associated, the function of the invention being to hold the pin inoperative position even though other means customalfi'ily employedshould work loose and fall The object of the invention is to provide an'improved construction which is exceedingljy simple and yet durable andeffective.

the accompanying draw' Fig. 1 is a plan view of the end of a brake rodand a brake lever, the said ends being secured together by a pin with mysafety lock applied;

Fig. 2 is 'a side elevation of the same- Fig. 8 is a perspectiveviewof-the lock alone before it is applied.

1 represents the forked end of a brake rod. 2 represents the end of abrake lever. These parts overlap and are rforated to receive a pivot pin3, the same aving a head at one end and ordinarily being provided with acotter pin 4 at the other end to hold it in place. Owing to the atvibration to which such parts are sub ected, it not infrequently happensthat cotter pins wear off or work out, and to that end 'I provide1mproved means for holdin the pivot pin in place even though this ouldoccur. My improved means comprises a bendable sheet metal strip shapedin a particular way to facilitate ready application and to aranteesecurity and strength in use. ThlS strip is bent so as to provide a base5 having a pin assage 6. The strip, at one end of the ass, is curved soas to form a recess closely approximatin the thickness of one of theforked ends 0 the brake rod, and this bend is provided with one or morelongitudinal corrugations 7-7, which very greatly stifiens the bendgiving to it a resistance to bending that it would not otherwise o 8 isan u standin flap at the end of the aforesaid bend an this flap isprovided with one or more longitudinal corrugations 9-9.

spaced These corrugations are preferably away from the lower end of theflap where it re ionaof the offset shoulder 10.

meets the bend a distance substantially equal to the thickness of thehead of the pinv 3, as plainly seen in the drawings. To apply thisdevice, the base 5 is inserted between one of the forks of the brake rod1 and the adjacent side of the brake lever 2, as shown in. Fi 2. Thehole in the base 1 is then cause to register with the pin passagesthrough the brake rod and lover. The pin 3 is then applied. It will benoted that the head of the pin, when fully in place, lies close to thebase of the fia 8. The operator may then, by a hammer-b ow, strike theend of the flap so as to cause the corrugated rtionthereof to be bentdown on top 0 the pm head makin it impossible to remove the latter untilt e flap has been again bent back to its original position ind cated indotted lines in Fig. 2. The bending down operation forms an ofisetshoulder 10. A cotter pm 4 may be applied to the pin in the usualmanner, 1f deslred. Itwill be noted that the corrugations in the mainbend stillon it to a ve marked degree, thereby resisting any straintending to osen the lock. By th1s construction, an ben ing strain sufli-'cient to open the loc will cause it to bend to theregion of the offsetshoulder 10, and

since this ofl'set shoulder is very close to the end of the flap, itrequires ver much greater force to bend the metal at t at pointtIbecause of the short leverage-afforded) an would be reguired to bendit at the end, but since the en is stiffened by corru tions, it followsthat the metal will yield Exit in the at I claim is: 1. As an article ofmanufacture, a saf retainer for pivot pins and the like for brake rods,comprising a bendable metal strip perforated at one end to form a pinpun-. and a U- haped bend intermediate the len ii of said stri forfittin snu ly over the brake rod, the ot er end 0 saifstri being bentoutwardly to form an offset oulder, the outer portion of saidofisetshoulder being bendable to form a retainer for the outerend of thepin.

2. As an article of manufacture, a safety retainer for pivot pins andthe like for brake rods, comprising a bendable metal strip perforated atone end to form a, pin passage a U-shaped bend intermediate the lengthof said strip for fitting snugly over the brake rod, the other end ofsaid strip being bent, outwardly to form an offset shoulder, the outerportion of said ofi'set shoulder being bendable to form a retainer forthe outer and of the pin, a longitudinal corrugation in said striparound said U-shaped bend to reinforce the same, and a corrugation in 10that part of the strip forming the pin head retaining shoulder.

' GEORGE THOMAS COOKE.

